Heating-stove burning gas or the like



F. M. LEA.

HEATING STOVE BURNING GAS OR THE LIKE.

APPLICATION FILED QCT. 31,1918.

. Patented Aug. 31,1920.

UNET 5.51

FFWE.

FREDERICK MACKENZIE LEA OF BIRMINGHAM, ENGLAND.

HEATING-STOVE BURNING GAS 0R LIKE.

Specification of Letters Patent. Patented Aug. 31, 1920.

Application filed October 31, 1918. Serial No. 260,562.

To (ZZZ whom it may concern:

Be it known that I, Fnnonmox MACKEN- zrn LEA, subject of the King of Great Britain, residing at 38 Bennetts Hill, Birmingtion are removed at or adjacent to the level of the burner, and has for its object to provide a simple and effective apparatus giving considerable heating effect with low gas consumption.

In the improved apparatus for burning gas in the presence of air an injector or chimney from the burner is surrounded by a closed chamber of comparatively large volume, sufficient to cool the gases of combustion, so that they fall in the outer chamber to a level or substantially so, with the gas and air inlet for the burner.

The arrangement and type of the burner may vary but a Bunsen burner projecting into the chimney or pipe referred to is satisfactory. The air may be admitted by a pipe leading into the bottom of the chimney or pipe adjacent the burner and the gas outlet from the stove may conveniently be arranged around the air inlet pipe.

The shape of the casing of the stove may vary to suit requirements, but I prefer to close the top by a removable lid or cover and also to form the part above the burner separate and secured to the base portion in which the burner is secured.

The heating apparatus may for some purposes, be jacketed with a water jacket and so serve for heating water for various purposes.

To show one convenient embodiment of the invention I have appended a drawing of a heating stove.

On the drawing Figure 1 is a sectional view thereof.

Fig. 2 shows one modification of the burner shaft or chimney.

In this example of construction a burner a which may be an ordinary burner, a Bunsen burner, or a special type of Bunsen hereinafter referred to, enters a chimney or shaft 7) leading up within a stove casing or chamber c. The air for the burner is introduced through a pipe d and the burnt gas outlet from the casing 0r chamber 0 is through a pipe 6. The bottom or stand portion f may conveniently be a cored casting providing a burner chamber 9 closed by a cover or gland h of any suitable kind. The casting also provides a connection at for the chimney b and around that a passage for the products of combustion is leading to the socket Z for the outlet pipe c. At the upper end of the passage 76 an external flange m may be formed to form a seat for the casing or stove chamber 0 which is then readily removable. The air inlet pipe d may be carried through the gas outlet 6 and screwed into the wall of the burner chamber 9.

The chimney b is shown in Fig. 1 with a slight taper from a larger outlet end to the end adjacent the burner, but it may have the form shown at Fig. 2 or any other suitable form.

The particular burner illustrated has a gas nozzle 4% and a relatively long truncated conoidal mixing tube 0 preferably adjustable with respectto thegas nozzle.

The cone may have a series or ring of holes a short distance from the top, as at 7) Fig. 2. In one example a series of six holes each about t diameter, was found effective as enabling the gas supply to be reduced considerably without the flame at the top of the mixing tube striking back to the nozzle.

The casing 0 has a lid g for cleansing or other purposes which may be machined to make a sufliciently good gas joint by its own weight. If desired an inspection aperture 1" may be provided and closed by a plug 8 readily removable so that the burner flame can be seen and the gas supply regulated as required.

To prevent the wind blowing across the end of the air pipe d and inducing a return draft which may cause flickering of the flame or may extinguish it, I may use any suitable baffle or deflector.

Any suitable baffle for the gas outlet pipe may also be provided.

I claim 1. An improved heating stove for burning gas in the presence of air, comprising in combination a burner chamber, a gas burner arranged therein, an air pipe leading to said burner chamber, an outer chamber having a seating at the top, a chimney outlet from said burner chamber above said burner, and within but closed from said outer chamber,

a closed casing of larger volume surrounding said chimney and secured on the seating of said outer chamber, said casing having free communication with the interior of said outer chamber, and said outer chamber having an outlet pipe for the products of combustion communicating therewith, said products rising in said chimney and being received in said casing and having their exit through said outer chamber below said casing. V

2. An improved heating stove for burning gas in the presence of air, comprising in combination a burner chamber, a gas burner arranged therein, an air pipe leading to said burner chamber, an outer chamber having a seating at the top, a chimney outlet from said burner chamber above said burner, and Within but closed from said outer chamber, a closed casing of larger volume surrounding said chimney and secured on the top seating of said outer chamber, said casing having free communication With the interior of said outer chamber, and said outer chamber having an outlet pipe for the proclucts of combustion communicating therewith, said outlet pipe being of larger diameter than the air inlet pipe and surrounding the latter. V

3. An improved heating stove for burning gas in the presence 01 air, comprising in combination, a burner chamber in one unitary structure, and having a removable side closure, a Bunsen burner in said chamber and a gas inlet to said burner carried through said closure; an outer chamber, a socket part in the Wall of said outer chamber receiving a pipe for forming the outlet for the products of combustion, an air inlet pipe arranged Within said outlet and entering the Wall of said burner chamber, a seating at the top of said unitary structure, a chimney projecting upwardly from said burner chamber, and a casing of relatively large volume secured in said seating and into Which'the upper end of the chimney opens, said casing communicating at the bottom With said outer chamber, the latter forming a restricted passageway for the products of combustion around said chimney and being provided with an outlet opening for said products.

In testimony whereof I flfiiX my signature.

FREDERICK MACKENZIE LEA. 

